<template>
  <div class='count'>
    <h1>{{count}}</h1>
    <button @click='add'>累加</button>
  </div>
</template>

<script>
export default {
    name:'MyCount',
    data(){
        return {
            count:0
        }
    },
    methods:{
        add(){
            this.count++
        }
    }
};
</script>

<style>
.count{
    background-color: aquamarine;
    height: 300px;
}
</style>